Re: telescopic Yoagan 6 LM rocket observation

From: Bram Dorreman (bram.dorreman@gmail.com)
Date: Thu May 13 2010 - 01:07:27 UTC

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    Ralf Vandebergh wrote:
    
    Hereby the results from a telescopic imaging session on Apr 30 of a favorable
    pass of Yoagan 6 LM rocket (34840 2009-021-B). All frames of the session
    show a well defined shape. . . .
    
    . . .Is there any information available about evidence of tumbling of
    this rocket?
    
    My response:
    
    Here follow the PPAS-observations since launch.
    
    09- 21 B 09-04-22 21:34:07.0 BD   75.7 0.3   7 10.8   A; +2.4->inv
    09- 21 B 09-04-24 20:59:28.5 BD   74.3 0.3   6 12.4   A; +1.5->6.0; 2)
    09- 21 B 09-04-29 21:07:10.5 AR  162.7 0.3   7 23.24  F; +4.5->6.5; 1)
    09- 21 B 09-05-08 20:03:45.1 BD   68.1 0.3   5 13.6   A; +3.5->6.0; 3)
    09- 21 B 09-05-08 21:39:27.3 BD  181.6 0.2  14 13.0   A; +1.5->inv; 4)
    09- 21 B 09-05-21 21:01:22.9 BD  150.6 0.3   5 30.2   AA'; +1.2->inv; 5)
    09- 21 B 09-05-24 21:43:19.3 BD   97.0 0.3   6 16.2   M; +3.0->7.8;
    09- 21 B 09-05-31 03:48:58   BY  102.4 1.0   5 20.5   A; +3->8
    09- 21 B 09-05-31 21:16:16.7 BD  208.2 0.3  12 17.4   A; +1.6->inv
    09- 21 B 09-06-22 21:07:14.1 BD   86.8 1.0   4 21.7   A; +1.7->4.8
    09- 21 B 09-06-23 20:50:34.1 BD  115.5 2     5 23     M; +0.7->inv 6)
    09- 21 B 10-04-08 20:22:01   LB   84.5 1.0   1 84.5   M; +4->6
    09- 21 B 10-04-17 20:45:56   BD                       S; +1.8; recheck
    09- 21 B 10-05-04 21:53:27   BD                       V; +2.3->3.1 alpLyn
    09- 21 B 10-05-05 21:35:13   BD                       S; +0.8 epsVir
    about 20 s after emersion
    
    The observations made in this year 2010 suggest that if there is a tumble period
    it will be rather long and difficult to determine. One observer was
    able to do so.
    
    All these observations, with short comments such as flash pattern and
    magnitudes and references to a comments file are available on
    Mike McCants website: http://www.io.com/~mmccants/bwgs/index.html
    
    You can also look at
    http://kunstmanen.vvs.be/php/satflash.php
    and enter 09- 21B in the query dialog box left of the "query verzenden" button.
    
    Site 4160: 51.27931 N, 5.47683 E (WGS84), 35 m
    Bram Dorreman (PPAS collector)
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